Spring boot: Two FactoryBean<RestTemplate> implementations - spring

Question

I've just created a FactoryBean implementation in order to request RestTemplate:
#Component
public class RestTemplateFactory
implements FactoryBean<RestTemplate>, InitializingBean {
//init resttemplate headers
}
So, now I'm able to inject a RestTemplate at whichever class:
#Service
public class DocumentServiceBackOffice {
private RestTemplate restTemplate;
public DocumentServiceBackOffice(RestTemplate restTemplate) {//...}
}
However, I'd like to create another FactoryBean<RestTemplate> in order to initialize other parameters.
How could I create in order to inject one or other according to a qualifier?
Any ideas?
EDIT
#Component
public class RestTemplateFactory
implements FactoryBean<RestTemplate>, InitializingBean {
private RestTemplate restTemplate;
private JWTService jwtService;
public RestTemplateFactory(JWTService jwtService) {
this.jwtService = jwtService;
}
public RestTemplate getObject() {
return this.restTemplate;
}
public Class<RestTemplate> getObjectType() {
return RestTemplate.class;
}
public boolean isSingleton() {
return true;
}
public void afterPropertiesSet() {
this.restTemplate = new RestTemplate();
JWTHeaderRequestInterceptor jwtInterceptor = new JWTHeaderRequestInterceptor(this.jwtService);
this.restTemplate.setInterceptors(Arrays.asList(jwtInterceptor));
}
}

Answer 1

Instead of using a FactoryBean just use an #Bean annotated method which accepts a RestTemplateBuilder and use that to configure instances.
#Bean
#Primary
public RestTemplate fooRestTemplate(RestTemplateBuilder builder, JWTService jwtService) {
return builder.additionalInterceptors(Collections.singletonList(new JwtHeaderInterceptor(jwtService)).build();
}
#Bean
public RestTemplate barRestTemplate(RestTemplateBuilder builder {
return builder.build();
}
This will result in 2 available RestTemplate instances. The fooRestTemplate (marked as default due to #Primary) and barRestTemplate. To specify the specific one to use add an #Qualifier("barRestTemplate") to use the not default one.
public DocumentServiceBackOffice(#Qualifier("barRestTemplate") RestTemplate restTemplate) { ... }

Answer 2

Another way to do it would be defining a configuration with two RestTemplate beans with qualifiers.
#Configuration
public class Configuration {
#Bean
#Qualifier("firstRestTemplate")
public RestTemplate firstRestTemplate(){
// any building logic here
return new Resttemplate();
}
#Bean
#Qualifier("secondRestTemplate")
public RestTemplate secondRestTemplate(){
// any building logic here
return new Resttemplate();
}
}
Then, in your code, use the right #Qualifier when autowiring.
Setter injection example:
#Service
public class Service {
#Autowired
#Qualifier("firstRestTemplate")
private RestTemplate template;
// ...
}
Constructor injection example:
#Service
public class Service {
private RestTemplate template;
public Service(#Autowired #Qualifier("firstRestTemplate") RestTemplate template) {
this.template = template;
}
// ...
}